Can I put a new roof over the old one?

Sometimes, and it is the building code that decides rather than the budget. The code sets out four routes by which a recover can qualify, including where the new covering goes down to the approved instructions of its manufacturer and where the new system is complete and separate and carries its own load. It also sets out three situations in which a recover is not permitted at all, and those three override the routes.

When is a recover not allowed?

Three conditions rule it out: where the existing roof or covering is water soaked or has deteriorated too far to be an adequate base for more roofing, where the existing covering is slate, clay, cement or asbestos-cement tile, and where the existing roof already has two or more applications of any type of covering.

Is two layers the limit or already too many?

Already too many. The wording bars a recover where the roof has two or more applications, so a building carrying two layers does not qualify. This is worth checking on any quote you are given, because it is an easy rule to state one layer out.

How do you know how many layers are up there?

By cutting a core and reading it, not by looking at the edge. Edges get built up, re-flashed and capped, and they can make one layer look like two or hide a third. The commercial hail page sets out how coring works and what it means for a membrane warranty.

What is the difference between re-roofing and roof replacement?

In the code, replacement means the removal of all existing layers of roof assembly materials down to the roof deck. Re-roofing is the wider term that covers both that and a recover. So a job called a replacement that leaves a layer in place is really a recover, and the two are inspected differently.

Does a commercial re-roof need a permit here?

Yes. Roof construction and reroofing are permitted and inspected under La. R.S. 37:3737(I), which East Baton Rouge applied to jobs starting after 1 August 2025. Which office issues it depends on the address, because St. George, Baker, Zachary and Central permit their own.

What does a commercial re-roof cost in Baton Rouge?

It follows the route the code allows, the area, the assembly and what the cores find, so no square foot rate appears on this page. A rate quoted before the layer count is known is a price for a job nobody has established is legal yet. The parish permit fee is set on the declared value and is itemised separately.

Is a coating the same as a recover?

No, although the code does allow a new protective coating over several existing surfaces without tear off. A coating is a liquid applied membrane and it is a separate service with its own page. It is not a way around the layer count, and it does not rescue an assembly that is already water soaked.

Home/Service Areas/Louisiana/Baton Rouge/Commercial Re-Roofing

Commercial Re-Roofing in Baton Rouge, LA

Big Easy Roofing re-roofs commercial buildings across Baton Rouge and East Baton Rouge Parish. Whether a new covering can go over the old one is decided by the building code, not by the budget and not by the roofer, and on a lot of buildings the code has already made the decision before anybody quotes.

Get Your Commercial Quote! Call (504) 800-8196

Service

City

Two or more layersRecover already barred

East Baton RougePermits the work

Down to the deckWhat replacement means

A coreHow layers get counted

Baton Rouge commercial re-roofing at a glance

Re-roofing means one of two things and the building code decides which. A recover puts a new covering over the existing one. A replacement removes every layer down to the deck. Three conditions rule a recover out entirely, and one of them is settled by nothing more complicated than counting the layers already up there.

The bar that is easy to state one layer out

Two or more layers

The code does not permit a roof recover where the existing roof has two or more applications of any type of covering. Two is already too many, not the limit. Call Big Easy Roofing on (504) 800-8196 and we will establish what is actually up there.

Who permits the work

East Baton Rouge Parish

Roof construction and reroofing on a commercial building are permitted and inspected through Permits and Inspections, or by St. George, Baker, Zachary or Central if the address sits there.

Where the rule lives

IBC Chapter 15, Section 1512

Reroofing has its own section in the roof assemblies chapter of the International Building Code, and it moved there from Section 1511 in the previous edition. Louisiana is on the 2021 editions with state amendments, so which text governs your job is settled with the parish for that building rather than assumed from the base code.

How the fee is set

On valuation

The parish sets the permit fee from the declared value of the work rather than from a roofing rate. A job that turns from a recover into a full removal moves that value, which is a reason to settle the code question before the fee is quoted.

What replacement means in the code

Down to the deck

Not a figure of speech. Roof replacement is defined as the removal of all existing layers of roof assembly materials down to the roof deck, with a narrow exception for a qualifying ice barrier membrane adhered to the deck. A job called a replacement that leaves a covering behind is a recover wearing the wrong name.

How the layers get counted

A core, not a guess

The number of layers is established by cutting and reading a core, not by looking at the edge detail, which can be built up to hide what is under it. The commercial hail page sets out how coring works and what it does to a membrane warranty.

There are only two outcomes here and the code chooses between them. A roof recover puts a new covering over the one already on the building. A roof replacement removes every layer of the roof assembly down to the deck. A recover is quicker, quieter and cheaper, it produces no tear off and very little disruption below, and where the code allows it there is nothing second rate about it.

The problem is that whether it is allowed is not a matter of opinion. The code names four qualifying routes and three outright prohibitions, and the prohibitions win: a building has to take one of the routes and be clear of all three bars. The table below sets out the three bars and the three routes that arise on commercial buildings here. The fourth route covers metal panel, metal shingle and concrete or clay tile laid over existing wood shakes, which is a residential situation and is not covered on this page.

The code test and which way each condition points

Every line below is a condition set out in the reroofing section of the building code, and the order matters. The first three end the discussion on their own. The rest are routes by which a recover can qualify, and a building has to take one of them AND be free of all three prohibitions.

Condition on the existing roof	What the code says	Outcome	What it means for you
Two or more applications of any type of covering already in place	A recover shall not be permitted	Full removal	Settled by counting the layers in a core rather than by opinion
Existing roof or covering water soaked, or too deteriorated to be an adequate base	A recover shall not be permitted	Full removal	The one condition that can change between surveys, so it is tested rather than assumed
Existing covering is slate, clay, cement or asbestos-cement tile	A recover shall not be permitted	Full removal	Where it is asbestos-cement, testing and removal come first and have their own page
New covering installed to the approved instructions of the covering manufacturer	A qualifying route	Recover possible	Only if none of the three prohibitions above applies. The instructions become part of the scope and the inspection checks against them
A complete separate system carrying its own load, such as standing seam metal panels	A qualifying route	Recover possible	Again only where no prohibition applies. It does not rely on the old roof for support, which is why the code treats it apart
A new protective coating over an existing coating, built up, modified bitumen or single ply	Permitted without tear off	Coating route	A different service with its own page, and it is not a substitute for a failed roof or a way round a prohibition

These are the conditions as the reroofing section sets them out, summarised rather than quoted in full, and Louisiana amendments can modify a section, so the position is confirmed with the parish before work is scoped. No work prices appear on this page; the permit fee follows the declared value. Call (504) 800-8196 and we will establish which line your building sits on.

What the permit covers and why the layer count comes first

The parish permits and inspects the work, and the inspection is against the code the job was scoped under. That makes the layer count the first fact of the project rather than a detail, because getting it wrong changes what the job legally is.

The permit itself

Required and inspected

Act 239 of 2025 introduced the requirement, now carried at La. R.S. 37:3737(I), requiring a parish or municipality that issues construction permits to permit and inspect roof construction and reroofing. East Baton Rouge applied it to jobs starting after 1 August 2025.

Which code the inspection uses

The commercial one

Subsection (I)(1) sends buildings other than one and two family dwellings to the International Building Code, and only (I)(2) sends houses to the residential code. So a commercial reroof is inspected against Chapter 15 rather than the residential provisions.

Why the count is established first

It decides the scope

A recover scoped on a building that turns out to carry two layers is not a cheaper version of the right job, it is a job the code does not permit. Finding that out after the materials are ordered costs more than the core did.

What we will not do

Guess it from the edge

A roof edge can be built up, re-flashed or capped in ways that make one layer look like two or hide that there are three. Anybody willing to price a recover without opening the roof is pricing a guess.

What a re-roofing quote should establish before it prices anything

How many applications of covering are on the building and how that was established, whether the existing assembly is dry and sound enough to be built on, and what the existing covering actually is. Those three answers decide between a recover and a full removal before a single product is named.

It should also say what happens if the cores come back differently from expected, because that is the moment a quote either holds or turns into a change order. Ours prices both outcomes where the answer is genuinely open.

Where a recover is genuinely the better job

On a sound single layer roof over a building that cannot easily be emptied, a recover is quicker, quieter, produces no tear off and puts nothing into landfill. Where the code permits one, the choice is a commercial judgement: disruption and first cost against added dead load, whatever stays concealed underneath, the drainage, and what it leaves you able to do next time.

The argument on this page is not that recovers are inferior. It is that whether you are allowed one is a question of fact about your building, and it should be answered before anybody has an opinion about your budget.

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What decides it on a Baton Rouge building

Of the three conditions that rule a recover out, two are fixed facts about the building and one is a condition that can change. That third one is the reason a re-roof survey here is worth doing close to the work rather than months ahead of it.

The water soaked condition is the one that moves

How many layers a roof has, and what the covering is made of, do not change between one survey and the next. Whether the assembly is water soaked or too deteriorated to build on absolutely does, and in this climate it can change over a season.

That is why a moisture survey belongs with the layer count rather than being treated as an optional extra, and why a code opinion given a long time before the work starts is worth checking again before anybody orders materials.

A recover adds weight and keeps the old problems

A recover leaves the existing assembly in place, which means it also leaves the existing falls, the existing drainage and any low spots exactly where they were. A new covering over a roof that ponds gives you a newer roof that ponds.

Where the drainage is the actual complaint, that is an argument for correcting it as part of the work rather than for choosing one route over the other, and it belongs on the quote as its own line either way.

Occupied buildings are the reason recovers are worth having

Tearing a commercial roof off exposes whatever is underneath to the weather for as long as the work takes, and in a climate that delivers rain in short heavy bursts that is a real operational risk for the tenant below.

A recover cuts down how much of the roof is open and for how long, though openings and weather protection are still part of the job. That is precisely why it is worth establishing properly whether the code allows one, rather than finding out halfway through that it does not.

Big Easy Roofing Process

Three steps, and the first one can end with the code deciding the job for you, which is better found out now than after the materials arrive.

A roofer reading the layers in a core cut through a commercial roof assembly

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Establish the layers and the condition

Cores read for how many applications of covering are present and what they are, and a moisture survey for whether the assembly is dry enough to build on. Those two answers establish whether any of the three prohibitions applies. A recover then still has to qualify under one of the routes and meet the rest of the chapter.

Scope against the code the inspection will use

Whichever route the building qualifies for, written up against the commercial provisions the parish will inspect against, with the manufacturer instructions named where the recover depends on them.

Permit on the declared value, then work

The permit taken out against the final scope rather than the first estimate, the work inspected, and the records kept. Call (504) 800-8196 to get the layers established.

Everything else we do in Baton Rouge

The rest of the Big Easy Roofing services available in Baton Rouge, each with its own page and its own written scope of work. The commercial replacement page covers which assembly suits the building, and it is the one to read next once the code question on this page has been answered.

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